Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb8dd64fcaf8ef5…

MALICIOUS

PDF

42.5 KB Created: 2021-05-13 08:12:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 12e8144351856e52189ce72659559864 SHA-1: 865be80fc7e9c38bd837722853c517e229a55be3 SHA-256: 3cb8dd64fcaf8ef504d83a5d95546ed22ba2ca153fe1645f6c52cc802c53df86
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links, including a high-priority lure for a "game hack" that redirects to a malicious URL. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs suggest a social engineering tactic to trick users into downloading potentially harmful content by promising game cheats or in-game currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-free-spin-group-game-hack PDF link annotation
    • http://bemviverclin.com.br/images/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b55.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B55 24680 bytes
SHA-256: efe5c87bd2d8f530ef7dbb7d8f4105cd6def9d0c8186373adf7ef0403952470e
font_01_sfnt_off0000847b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x847B 18028 bytes
SHA-256: 455ad58cd2f709b2f88bdd169b409c5f407812edddc96e3ba24164b17eb8999f

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